<players> will display the number of players currently in the tournament
<buyins> will display the number of buy-ins
<rebuys> will display the number of rebuys
To display a computed value, use the <expression> token. It takes a formula, computes the result, and displays that. Examples:
<expression text="buyins + totalRebuys" format="number">
<expression text="playersLeft / (buyins + totalRebuys)" format="number" precision="1">